Mud-club

Vehicle & Technical => Defender => Topic started by: jimthelandyman on March 02, 2006, 21:05:28

Title: grrrrrrrrrr MOT
Post by: jimthelandyman on March 02, 2006, 21:05:28

Just failed its MOT on emissions, the garage said it maybe because of my snorkel because it is harder to breathe and therefore it's smoking, do you think that this could be the case?

Title: grrrrrrrrrr MOT
Post by: muddyweb on March 02, 2006, 21:09:46

I don't think that is likely, but it's easy enough to prove or disprove... just take the pipe off at the filter

Title: grrrrrrrrrr MOT
Post by: jimthelandyman on March 02, 2006, 21:12:25

good thinking i should tell them that so that they don't charge me for looking around at other stuff if it is the case, cheers.

Title: grrrrrrrrrr MOT
Post by: bezzabsa on March 03, 2006, 14:18:09

how can a snorkel make it harder for an engine to breathe??? if anything i always thought they made the engine suck air easier?????

Title: grrrrrrrrrr MOT
Post by: Henry Webster on March 03, 2006, 14:41:18

Quote from: "bezzabsa"

how can a snorkel make it harder for an engine to breathe??? if anything i always thought they made the engine suck air easier?????

It is a longer route for the air to travel down (try breathing through a hose pipe! :wink: ) There is potentially some benefit from Safari snorkel types of ram air effect when travelling, but this doesn't apply for the MOT test.

The other potential benefit of a snorkel is that the air will possibly be cooler and therefore denser by picking it up higher in the fresh air, however I don't think that it often out-weighs the hosepipe thing, but am happy to be proven wrong!

With a diesel it is always worth giving it a good thrash before the MOT, if it hasn't been used for a bit it could be a bit smoky.

There are additives that you can use to help with the test if all else fails.

Title: grrrrrrrrrr MOT
Post by: extreme90 on March 03, 2006, 17:34:23

winde the throttle stop in 5 turns, so when they boot it it wont chuck as much diesel in and cause it to smoke, it works for me then when i get back from the test station just winde it back out 5 turns and jobs a gun en, cant see how a snorkel will make it smoke it will just cause the engine to loose a little power as the air has to travel further but you can overcome this by increasing the diameter of the intake hose

Title: grrrrrrrrrr MOT
Post by: Philtractor on March 04, 2006, 00:02:00

try a tin of forte disel conditioner with only £10 worth of fule, It works 99% Of the time.

Good luck  :wink:

Title: grrrrrrrrrr MOT
Post by: jimthelandyman on March 05, 2006, 19:32:41

Its still at the MOT station missed the snow and a blooming off road day, i'm very mad !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!